Do you have a backbone? Yes! People have backbones. Birds, fish, and some other kinds of animals have backbones too. Backbones make us vertebrates. Without backbones, we'd be like jelly!
你有脊椎嗎?當然啦! 人類、鳥類跟許多動物都有脊椎，不然我們會像果凍一樣!
Click HERE for the full transcript!
